An iterated local search algorithm for water distribution network design optimization

The optimal design of water distribution networks is a complex non-linear combinatorial optimization problem. It consists in finding the least-cost pipe configuration that satisfies hydraulic laws and customer requirements, using a limited set of available pipe types. In a previous paper De Corte and Sorensen, Eur J Oper Res 228 2013, 1-10, we have argued that state-of-the-art optimization algorithms proposed in this domain are unduly complicated and poorly tested. The main contribution of this article is a straightforward, fast, transparent, and effective iterated local search ILS algorithm that has at least equivalent performance when compared to the best approaches in the literature, but has a much simpler algorithmic structure. A full-factorial experiment is conducted to obtain the heuristic's best parameter settings. Contrary to existing algorithms, the ILS algorithm is additionally shown to perform well on a broad set of much more challenging HydroGen De Corte and Sorensen, Water Resour Manage 28 2014, 333-350 test instances. © 2015 Wiley Periodicals, Inc. NETWORKS, Vol. 673, 187-198 2016

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